In one-way mode, a contract supports only one active position direction at a time — either long or short.
If you place an order in the opposite direction, it will first close your existing position (partially or fully), then open a new position if the volume exceeds the previous one.
Example:
You're trading the BTCUSDT contract:
You hold 1 BTC long.
You open a 2 BTC short order.
Result:
Your 1 BTC long is closed.
A 1 BTC short position is established.
Two-Way Position Mode
In two-way mode, a contract supports simultaneous long and short positions. Orders in the opposite direction do not close existing positions — instead, they create independent positions.
⚠️ Positions in opposite directions do not hedge each other. Each is exposed to market movements individually.
Example:
You're trading the BTCUSDT contract:
You hold 1 BTC long.
You open a 2 BTC short order.
Result:
You now hold 1 BTC longand2 BTC short at the same time.